Juno, i'm having my second one later this year, the two kiddies will be 16 months apart. We didn't plan this pregnancy, I just stopped breastfeeding and was switching birthcontrol, but in all honesty, I really did want another baby... And although I know it won't be easy, I know it will be allright and that I will love them both endlessly.
So if you feel like its time to make it happen, just go for it, in the end you will cope...